package com.atguigu.facade;

public class Projector {

	private static Projector instance = new Projector();
	
	private Projector() {
		
	}
	
	public static Projector getInstance() {
		return instance;
	}
	
	public void on() {
		System.out.println("Projector on");
	}
	
	public void off() {
		System.out.println("Projector off");
	}
	
	public void focus() {
		System.out.println("Projector is focus");
	}
}
